1705381920 has 576 divisors, whose sum is σ = 6883688448. Its totient is φ = 380160000.

The previous prime is 1705381907. The next prime is 1705381933. The reversal of 1705381920 is 291835071.

It is an interprime number because it is at equal distance from previous prime (1705381907) and next prime (1705381933).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11293845 + ... + 11293995.

It is an arithmetic number, because the mean of its divisors is an integer number (11950848).

Almost surely, 2^1705381920 is an apocalyptic number.

1705381920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1705381920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3441844224).

1705381920 is an abundant number, since it is smaller than the sum of its proper divisors (5178306528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1705381920 is a wasteful number, since it uses less digits than its factorization.

1705381920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1705381920 is about 41296.2700494851. The cubic root of 1705381920 is about 1194.7413222528.

The spelling of 1705381920 in words is "one billion, seven hundred five million, three hundred eighty-one thousand, nine hundred twenty".